CN107246014A - Detachable foundation pit trestle system and its construction method - Google Patents
Detachable foundation pit trestle system and its construction method Download PDFInfo
- Publication number
- CN107246014A CN107246014A CN201710518803.XA CN201710518803A CN107246014A CN 107246014 A CN107246014 A CN 107246014A CN 201710518803 A CN201710518803 A CN 201710518803A CN 107246014 A CN107246014 A CN 107246014A
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- China
- Prior art keywords
- trestle
- steel plate
- foundation pit
- roadbed box
- plate roadbed
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G27/00—Temporary arrangements for giving access from one level to another for men or vehicles, e.g. steps, ramps
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The present invention relates to a kind of detachable foundation pit trestle system and its construction method, belong to foundation ditch trestle technical field.Detachable foundation pit trestle system includes trestle beam and some steel plate roadbed boxes being layed on the trestle beam, the trestle beam is a part for the foundation ditch horizontal supports, including end bay beam and the intermediate beam being arranged between the end bay beam, by connecting bar connecting between the adjacent steel plate roadbed box, trestle area is formed.Trestle area is arranged on foundation ditch horizontal supports, both ensure that enough support stiffness, the advantage that steel plate roadbed box is easy for installation is make use of again, steel plate roadbed box trestle plate, which can combine foundation ditch or basement construction, to be needed to be dismounted.Detachable foundation pit trestle system and its construction method that the present invention is provided; the problems such as construction space present in the base pit engineering of narrow field is not enough, environmental protection requirement is high can be solved; and can improve the prefabrication and assembly construction rate of trestle system, while also have the advantages that section material, save land, energy-saving and environmental protection.
Description
Technical field
The present invention relates to a kind of detachable foundation pit trestle system and its construction method, belong to foundation ditch trestle technical field.
Background technology
In recent years, with the exploitation of urban underground space, increasing base pit engineering is located at business district, often there is foundation ditch week
Side building dense, the narrow and small situation in construction site, for such engineering, typically provides part construction by setting foundation ditch trestle
Place.And the trestle system commonly used in engineering is armored concrete trestle system and steel trestle system.
Armored concrete trestle system is reinforced concrete support binding reinforcement concrete trestle, and trestle plate is with trestle beam
One-piece casting, trestle plate is non-dismountable.When trestle is close to above basement roof, the trestle plate of one-piece casting will hinder should
The reinforcing bar colligation of basement roof below region and concrete pouring construction, make structure roof can not one-piece casting and formed and applied
Work is stitched, and influences agent structure waterproof.
Steel trestle system is Horizontal steelwork bracing combination steel trestle, because conventional bracing members rigidity is smaller, will be caused
Foundation ditch displacement is larger, it is impossible to meet Deformation control requirement of the periphery complex environment to foundation ditch.
Further, since the load suffered by trestle region is larger, to ensure the stress reliability of trestle system, ordinary circumstance
Under, trestle plate is held on above trestle beam, therefore, the gross thickness of trestle beam slab system is larger.
The content of the invention
For some problems that existing trestle technology is present in base pit engineering, the invention provides a kind of detachable foundation pit
Trestle system, including trestle beam and some steel plate roadbed boxes being layed on the trestle beam, the trestle beam is the foundation ditch
By connecting bar connecting between a part for horizontal supports, the adjacent steel plate roadbed box, trestle area is formed.Trestle area is set
It is placed on foundation ditch horizontal supports, without prejudice to foundation pit construction, and is combined using armored concrete trestle beam and steel plate roadbed box
Mode, facilitates subgrade case to dismantle.Meanwhile, present invention also offers a kind of construction method of detachable foundation pit trestle system.
To solve above technical problem, the present invention includes following technical scheme：
A kind of detachable foundation pit trestle system, including：
Trestle beam, the trestle beam is a part for the horizontal supports of the foundation ditch, and the trestle beam includes end bay beam
And the intermediate beam being arranged between the end bay beam；And
Some steel plate roadbed boxes, the steel plate roadbed box is layed on the trestle beam, the adjacent steel plate roadbed box it
Between by connecting bar connecting, composition trestle area.
Preferably, the end bay beam is side notch type section, including for shelving the concave part of the steel plate roadbed box
With the end-blocking portion for stopping the steel plate roadbed box sidesway, the upper surface of the concave part and the upper surface of the intermediate beam are put down
Together.
Preferably, mortar is filled between the steel plate roadbed box and the end-blocking portion.
Preferably, it is provided with trestle ramp between the end-blocking portion and nature terrace.
Correspondingly, present invention also offers a kind of construction method of detachable foundation pit trestle system, comprise the following steps：
S1. the building enclosure of construction foundation pit, carries out excavation of foundation pit, and uniformly pour the horizontal supports and trestle beam of foundation ditch
End bay beam, intermediate beam, the concave part of the end bay beam is towards the intermediate beam；
S2. after the completion of stack bridge maintenance, steel plate roadbed box is laid on the concave part and the intermediate beam of the end bay beam,
Reinforcing bar is welded to connect between the adjacent steel plate roadbed box, and in the end-blocking portion of the steel plate roadbed box and the end bay beam
Between fill mortar, form trestle area, be used as construction site；
S3. the hierarchical block excavation pit soil body pours base plate of foundation pit and basement wall, construction to the trestle to bottom is cheated
During basement roof below area, the steel plate roadbed box is removed paragraph by paragraph, carries out the colligation of basement roof reinforcing bar, formwork erection and coagulation
Soil is poured；
S4. treat that basement roof is poured to finish, the steel plate roadbed box is spread again, continue to provide construction site.
The present invention is allowed to compared with prior art, have the following advantages that and actively imitate due to using above technical scheme
Really：
(1) using the combination form of " armored concrete trestle beam+steel plate roadbed box trestle plate ", enough branch both ensure that
Rigidity is supportted, the advantage that make use of steel plate roadbed box easy for installation again can effectively control foundation pit deformation, protect surrounding enviroment, and contract
The short construction period.
(2) steel plate roadbed box trestle plate is laid on trestle beam, steel plate roadbed box can need flexibly to be torn open according to construction
Dress, not only solves the equipment in narrow and small construction site and parks and vehicle pass-through problem, and accomplish without prejudice to foundation ditch and underground
Room is constructed, and basement roof is reached one-piece casting, it is to avoid staying for construction joint sets, it is ensured that permanent structure preferable globality
And water-proof function.
(3) steel plate roadbed box can prefabrication, and repeatedly use, add the prefabrication and assembly construction rate of engineering, improve material
The recovery utilization rate of material, the requirement that active response national green is built, effectively accomplish section material, save land, energy-saving and environmental protection.
(4) end bay beam is using the notch type section optimized, and steel plate roadbed box uses embedded arrangement, effectively reduces trestle
The gross thickness of system, can increase construction area headroom below trestle system, convenient lower section excavation of foundation pit, basement construction are gone back simultaneously
The gradient and length in trestle ramp can be reduced, so as to make full use of limited construction space.
Brief description of the drawings
Fig. 1 be one embodiment of the invention in foundation ditch trestle floor plan；
Fig. 2 is the sectional view in Fig. 1 along A-A sections；
Fig. 3 is the steel plate roadbed box splicing schematic diagram in one embodiment of the invention；
The work progress figure for the detachable foundation pit trestle system that Fig. 4-Fig. 7 provides for another embodiment of the present invention.
Label is as follows in figure：
Foundation ditch 100；Protection building 110；Protection greening 120；Horizontal supports 130；Building enclosure 140；Nature terrace
150；Trestle ramp 160；
Trestle beam 210；End bay beam 211, end-blocking portion 211a, concave part 211b；Intermediate beam 212；Steel plate roadbed box 220；Even
Connect reinforcing bar 221；Mortar 222.
Basement 300；Base plate of foundation pit 310；Basement wall 320；Basement roof 330.
Embodiment
The detachable foundation pit trestle system and its construction party provided below in conjunction with the drawings and specific embodiments the present invention
Method is described in further detail.With reference to following explanation and claims, advantages and features of the invention will become apparent from.Need explanation
, accompanying drawing uses very simplified form and uses non-accurately ratio, only conveniently, lucidly to aid in illustrating originally
The purpose of inventive embodiments.
Referring to Fig. 1, in the base pit engineering of Shanghai City, the cutting depth of foundation ditch 100 is 5-7m, the surrounding of foundation ditch 100 is close to
The buildings or structures of environment sensitive, wherein three faces are protection building 110, another side is provided with protection greening 120, intensive guarantor
The environmental protection requirement that shield thing causes foundation ditch 100 to be constructed is high and available almost without ready-made construction site, in addition, engineering work
Phase and quality requirement are also higher.Therefore, the Solve problems in construction in existing small space is not only needed, and environment need to be taken into account
Protection, construction quality and duration.
With reference to shown in Fig. 1 and Fig. 2, the detachable foundation pit trestle system that provides of the present invention, including trestle beam 210 and some
Steel plate roadbed box 220, wherein trestle beam 210 are a part for the horizontal supports 130 of foundation ditch 100, and trestle beam 210 includes end bay
Beam 211 and the intermediate beam 212 being arranged between end bay beam 211, steel plate roadbed box 220 are layed on trestle beam 210, adjacent steel plate
Connected between subgrade case 220 by connecting reinforcing bar 221, composition trestle area.The size of trestle beam 210 is according to steel plate roadbed box 220
The factors such as weight, heaped load, vehicular load are designed.As an example, with connection reinforcing bar 221 between steel plate roadbed box 220
It is connected, connection reinforcing bar 221 can use Φ 20, to increase the globality of trestle system；In order to prevent vehicle tyre from wearing and tearing, even
Connect reinforcing bar 221 and be welded in the bottom surface of steel plate roadbed box 220.As shown in figure 1, trestle system in terms of the horizontal layout on, by trestle body
System with the Uniting of horizontal supports 130 consider, make trestle system L-shaped in horizontal layout, while towards building site gate,
While going deep into the center of foundation ditch 100, facilitate vehicles while passing and constructing operation.
In the present invention, by the way that a part of horizontal supports 130 of foundation ditch 100 are designed as into the trestle beam that trestle system needs
210, with following advantage or beneficial effect：(1) using " armored concrete trestle beam 210+ steel plate roadbed boxes 220 " it is combined
Formula, both ensure that enough support stiffness, and the advantage that make use of steel plate roadbed box 220 easy for installation again effectively protects periphery
Environment, shorten the construction period；(2) steel plate roadbed box 220 is laid on trestle beam 210, steel plate roadbed box 220 can be according to construction
Need flexibly to be dismounted, not only solve the equipment in narrow and small construction site and park and vehicle pass-through problem, and accomplish not
Foundation ditch 100 and basement 300 is hindered to construct, it is to avoid the secondary of basement roof below trestle area projection is poured and construction joint
Stay and set, it is ensured that the structural integrity and water-proof function of basement 300；(3) steel plate roadbed box 220 can prefabrication, and
Repeatedly use, add the prefabrication and assembly construction rate of engineering, improve the recovery utilization rate of material, meet wanting for national green construction
Ask, effectively accomplish section material, save land, energy-saving and environmental protection.
Preferably, end bay beam 211 is side notch type section, including for shelving the concave part of steel plate roadbed box 220
211b and the end-blocking portion 211a for stopping the sidesway of steel plate roadbed box 220, concave part 211b upper surface are upper with intermediate beam 212
Flush.Mortar 222 is filled between steel plate roadbed box 220 and end-blocking portion 211a, in end-blocking portion 211a and nature terrace 150
Between trestle ramp 160 is set.
End bay beam 211 is used embedded arrangement, effectively reduced using the notch type section optimized, steel plate roadbed box 220
The gross thickness of trestle system, can increase construction area headroom below trestle system, foundation ditch 100 is excavated, basement 300 is applied for convenient lower section
Work, while the gradient and length in trestle ramp 160 can also be reduced, so as to make full use of limited construction space.
As an example, case bay 2m~3m of trestle beam 210, can locally combine original angle brace make the plane of trestle beam 210 be in
X-shaped arranged crosswise, can increase support integral rigidity while reducing trestle system span, control foundation ditch 100 is deformed.Steel plate road
Base case 220 uses market finished product, and such as specification is 6m × 1m.
Present invention also offers a kind of construction method of detachable foundation pit trestle system, referring next to Fig. 4 to Fig. 7 institutes
Show, and combine Fig. 1 to Fig. 3, construction method is further described, following steps are specifically included：
S1. as shown in figure 4, the building enclosure 140 of construction foundation pit 100, carries out foundation ditch 100 and excavate, and pour foundation ditch 100
Horizontal supports 130, and uniformly pour end bay beam 211, the intermediate beam 212 of horizontal supports 130 and trestle beam 210, end bay beam
211 concave part 211b is towards intermediate beam 212.If horizontal supports have multiple tracks about 130, trestle beam 210 and first of water
Flat supporter 130 pours and forms monolithic construction together.
S2. as shown in figure 5, treat trestle beam 210 conserve after the completion of, in the concave part 211b and intermediate beam 212 of end bay beam 211
Upper laying steel plate roadbed box 220, reinforcing bar 221 is welded to connect between adjacent steel plate roadbed box 220, and in steel plate roadbed box
Mortar 222 is filled between 220 and the end-blocking portion 211a of end bay beam 211, trestle area is formed, is used as construction site.In trestle beam 210
Space mortar 222 between steel plate roadbed box 220 is filled, with fixation steel plate subgrade case 220, adjacent steel plate roadbed box
Welded between 220 with connection reinforcing bar 221 in bottom, to improve the globality of subgrade case.
S3. as shown in fig. 6, the soil body of hierarchical block excavation pit 100 is to bottom is cheated, base plate of foundation pit 310 and basement wall are poured
Body 320, when constructing to basement roof 330 below trestle area, removes steel plate roadbed box 220, carries out basement roof paragraph by paragraph
330 reinforcing bar colligations, formwork erection and concreting.When basement 300 is constructed to basement roof 330, it is necessary to temporarily remove steel
Plate subgrade case 220, so that basement roof 330 is constructed.
S4. finished as shown in fig. 7, treating that basement roof 330 is poured, steel plate roadbed box 220 is spread again, offer is provided and applied
Workshop.Construction site is not considered as when being designed due to basement roof 330, therefore, if using basement roof 330 as applying
Workshop, material, the heaped load of equipment and vehicular load will cause to damage to a certain degree to basement roof 330, therefore,
Basement roof 330, which is poured, to be finished, and steel plate roadbed box 220 can be spread again, is continued as engineering and is provided construction site, can avoid damaging
Evil basement roof 330, and accelerating construction progress, it is ensured that duration of a project.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Scope.
Claims (5)
1. a kind of detachable foundation pit trestle system, it is characterised in that including：
Trestle beam, the trestle beam is a part for the horizontal supports of the foundation ditch, and the trestle beam is including end bay beam and sets
The intermediate beam being placed between the end bay beam；And
Some steel plate roadbed boxes, the steel plate roadbed box is layed on the trestle beam, is led between the adjacent steel plate roadbed box
Cross connection bar connecting, composition trestle area.
2. detachable foundation pit trestle system as claimed in claim 1, it is characterised in that the end bay beam is side notch type
Section, including for shelving the concave part of the steel plate roadbed box and end-blocking portion for stopping the steel plate roadbed box sidesway,
The upper surface of the concave part is concordant with the upper surface of the intermediate beam.
3. detachable foundation pit trestle system as claimed in claim 2, it is characterised in that the steel plate roadbed box and the envelope
Mortar is filled between end.
4. detachable foundation pit trestle system as claimed in claim 3, it is characterised in that the end-blocking portion and nature terrace it
Between be provided with trestle ramp.
5. a kind of construction method of detachable foundation pit trestle system, it is characterised in that comprise the following steps：
S1. the building enclosure of construction foundation pit, carries out excavation of foundation pit, and uniformly pour the horizontal supports of foundation ditch and the side of trestle beam
Bridge, intermediate beam, the concave part of the end bay beam is towards the intermediate beam；
S2. after the completion of stack bridge maintenance, steel plate roadbed box is laid on the concave part and the intermediate beam of the end bay beam, in phase
Reinforcing bar is welded to connect between the adjacent steel plate roadbed box, and between the end-blocking portion of the steel plate roadbed box and the end bay beam
Mortar is filled, trestle area is formed, is used as construction site；
S3. the hierarchical block excavation pit soil body pours base plate of foundation pit and basement wall, under construction to the trestle area to bottom is cheated
During the basement roof of side, the steel plate roadbed box is removed paragraph by paragraph, is carried out the colligation of basement roof reinforcing bar, formwork erection and concrete and is poured
Build；
S4. treat that basement roof is poured to finish, the steel plate roadbed box is spread again, continue to provide construction site.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710518803.XA CN107246014A (en) | 2017-06-30 | 2017-06-30 | Detachable foundation pit trestle system and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710518803.XA CN107246014A (en) | 2017-06-30 | 2017-06-30 | Detachable foundation pit trestle system and its construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107246014A true CN107246014A (en) | 2017-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710518803.XA Pending CN107246014A (en) | 2017-06-30 | 2017-06-30 | Detachable foundation pit trestle system and its construction method |
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| CN (1) | CN107246014A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222010A (en) * | 2018-03-20 | 2018-06-29 | 南京市测绘勘察研究院股份有限公司 | A kind of recyclable steel concrete combined type foundation pit trestle work structure of assembled and construction method |
| CN108999044A (en) * | 2018-09-19 | 2018-12-14 | 北京城建集团有限责任公司 | A kind of modularization subgrade case, steel plank road platform structure and its construction method |
| CN109440784A (en) * | 2018-12-25 | 2019-03-08 | 上海建工七建集团有限公司 | Regularization prefabricated assembling type reinforced concrete supports cover board and construction method |
| CN110593081A (en) * | 2019-08-30 | 2019-12-20 | 中国二十二冶集团有限公司 | Component hoisting walking foundation for large railway station house under complex environment and construction method |
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| JP2009057680A (en) * | 2007-08-29 | 2009-03-19 | Ohbayashi Corp | Structure and method for supporting covering plate |
| CN201169781Y (en) * | 2008-02-22 | 2008-12-24 | 上海市政工程设计研究总院 | Cap digging pit structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222010A (en) * | 2018-03-20 | 2018-06-29 | 南京市测绘勘察研究院股份有限公司 | A kind of recyclable steel concrete combined type foundation pit trestle work structure of assembled and construction method |
| CN108999044A (en) * | 2018-09-19 | 2018-12-14 | 北京城建集团有限责任公司 | A kind of modularization subgrade case, steel plank road platform structure and its construction method |
| CN108999044B (en) * | 2018-09-19 | 2024-02-27 | 北京城建集团有限责任公司 | Steel trestle platform structure applying modularized roadbed box and construction method of steel trestle platform structure |
| CN109440784A (en) * | 2018-12-25 | 2019-03-08 | 上海建工七建集团有限公司 | Regularization prefabricated assembling type reinforced concrete supports cover board and construction method |
| CN110593081A (en) * | 2019-08-30 | 2019-12-20 | 中国二十二冶集团有限公司 | Component hoisting walking foundation for large railway station house under complex environment and construction method |
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